New Mexico has 21 hot springs, including 7 free primitive soaks and 14 paid resorts, the highest concentration of continuously used ancient Indigenous hot springs still open to the public, with sites like Ojo Caliente, Jemez Springs, and Montezuma soaked in for more than 1,000 years by Pueblo, Ute, and Apache peoples before European arrival. New Mexico is the only state where a single valley (the Jemez) contains four distinct free primitive soaks accessible from one 30-mile stretch of highway. Springs cluster in three regions: the Jemez Mountains (Spence, San Antonio, McCauley, Jemez Springs Bath House), the Rio Grande corridor near Taos (Manby/Stagecoach, Black Rock), and the north-central resort corridor (Ojo Caliente, Ten Thousand Waves). Flagship sites include Spence Hot Springs, San Antonio Hot Springs, McCauley Warm Springs, Manby (Stagecoach), and Ojo Caliente. New Mexico's thermal activity is driven by the Rio Grande Rift and residual heat from the Valles Caldera. Surface temperatures range 90-140°F. Land ownership is mixed: US Forest Service (Santa Fe, Carson National Forests), BLM, and private resorts. Access is a mix of drive-up (Manby, Ojo) and hike-in (San Antonio is 5 miles each way, Spence is 0.5 miles). Best season is April-November for high-elevation Jemez sites while Ojo Caliente is year-round. Gateway airport is Albuquerque and Santa Fe is the primary trip base. Clothing-optional is common at wild Jemez sites. Reviewed and updated July 2026. Use the map to plan a Jemez Valley free-soak loop.